I don't know of a standard rating scale for the density of silicone in the sex toy industry, but there definitely is a difference in density when comparing toys from various companies. I have silicone toys from several companies and I came up with a scale (from most plush/soft to most firm/dense) in this review, in case it helps:
link

I don't know of a standard rating scale for the density of silicone in the sex toy industry, but there definitely is a difference in density when comparing toys from various companies. I have silicone toys from several companies and I came up
...

I don't know of a standard rating scale for the density of silicone in the sex toy industry, but there definitely is a difference in density when comparing toys from various companies. I have silicone toys from several companies and I came up with a scale (from most plush/soft to most firm/dense) in this review, in case it helps:link

Unfortunately the silicone densities can vary in different product lines from the same company too. The companies that Selective Sensualist mentioned seem to be pretty consistent, but we've had silicone toys made by another manufacturer that have varied from jelly-like to Tantus-level densities.

Unfortunately the silicone densities can vary in different product lines from the same company too. The companies that Selective Sensualist mentioned seem to be pretty consistent, but we've had silicone toys made by another manufacturer that have
...

Unfortunately the silicone densities can vary in different product lines from the same company too. The companies that Selective Sensualist mentioned seem to be pretty consistent, but we've had silicone toys made by another manufacturer that have varied from jelly-like to Tantus-level densities.

Wild. It's an interesting material. Honestly, I had no idea there was such variety until I got into sex toys. The geek in me really wants to learn more about it!